The Popular BN1 is the largest size brush with 8 rings of boar bristle & nylon tufts. The brush is 9 inches long (head length is 5 inches) and 3 1/4 inches wide. The size is the largest of the Mixture brushes.

The Junior (B2, BN2) is a medium size brush with 7 rings of boar bristle or boar & nylon tufts. The brush is 9 inches long (head length is 4 3/4 inches) and 2 3/4 inches wide. The size is the next size down from the popular size brush and is larger than the handy size brush.

The Handy (B3, BN3) is a "handy" size brush with 6 rings of boar bristle or boar & nylon tufts. The brush is 8 1/2 inches long (head length is 4 3/8 inches) and 2 1/2 inches wide. The size is between the junior size brush and the pocket size brush.

The Pocket (B4, BN4, N4) is a smaller "pocket" size brush with 5 rings of either pure boar bristle, boar bristle & nylon tufts or pure nylon. The brush is 6 3/4 inches long (head length is 3 1/2 inches) and 2 inches wide. The size is the next size down from the handy size brush and is the smallest of the handled brushes.